Method and user equipment for receiving downlink signal and method and base station for transmitting downlink signal

Abstract

The present invention provides: a base station for repeatedly transmitting a physical downlink control channel (PDCCH) during a first subframe bundle comprising a plurality of subframes, and transmitting a PDSCH related to the PDCCH; and user equipment for receiving the PDCCH and the PDSCH. The PDSCH can be transmitted to the user equipment starting from subframe n+k, which is the kth subframe after the last subframe n−1 in the first subframe bundle, wherein k is an integer bigger than 0. The first subframe bundle may begin from a predetermined or fixed position.

The invention claimed is: 
     
       1. A method for receiving, by a user equipment, downlink data, the method comprising:
 repeatedly receiving, by the user equipment, a physical downlink control channel (PDCCH) carrying downlink control information multiple times across N consecutive subframes, where N is an integer greater than 1; and 
 repeatedly receiving, by the user equipment, a physical downlink shared channel (PDSCH) carrying the downlink data multiple times, across D consecutive subframes starting from a subframe n+k after a subframe n, based on the downlink control information, 
 wherein the subframe n is within the N consecutive subframes, and the subframe n is a subframe where the PDCCH is received last, 
 wherein the downlink control information includes repetition number information for the PDSCH, and D is an integer determined based on the repetition number information, and 
 wherein k is an integer greater than 0. 
 
     
     
       2. The method according to  claim 1 , further comprising:
 receiving, by the user equipment, a higher layer signal including information on a maximum number of repetitions for the PDCCH, 
 wherein N is less than or equal to the maximum number of repetitions for the PDCCH. 
 
     
     
       3. The method according to  claim 1 , further comprising:
 receiving, by the user equipment, information on a start of the N consecutive subframes. 
 
     
     
       4. The method according to  claim 1 , wherein the repeatedly received PDCCH is received using a same control channel element (CCE) resource within the N consecutive subframes. 
     
     
       5. A method for transmitting, by a base station, downlink data, the method comprising:
 repeatedly transmitting, by the base station, a physical downlink control channel (PDCCH) carrying downlink control information multiple times across N consecutive subframes, where N is an integer greater than 1; and 
 repeatedly transmitting, by the base station, a physical downlink shared channel (PDSCH) carrying the downlink data multiple times, across D consecutive subframes starting from a subframe n+k after a subframe n, based on the downlink control information, 
 wherein the subframe n is within the N consecutive subframes, and the subframe n is a subframe where the PDCCH is transmitted last, 
 wherein the downlink control information includes repetition number information for the PDSCH, and D is an integer determined based on the repetition number information, and 
 wherein k is an integer greater than 0. 
 
     
     
       6. The method according to  claim 5 , further comprising:
 transmitting, by the base station, a higher layer signal including information on a maximum number of repetitions for the PDCCH, 
 wherein N is less than or equal to the maximum number of repetitions for the PDCCH. 
 
     
     
       7. The method according to  claim 5 , further comprising:
 transmitting, by the base station, information on a start of the N consecutive subframes. 
 
     
     
       8. The method according to  claim 5 , wherein the repeatedly transmitted PDCCH is transmitted using a same control channel element (CCE) resource within the N consecutive subframes. 
     
     
       9. A user equipment for receiving downlink data, the user equipment comprising:
 a transceiver unit, and 
 a processor configured to control the transceiver to: 
 repeatedly receive a physical downlink control channel (PDCCH) carrying downlink control information multiple times across N consecutive subframes, where N is an integer greater than 1; and 
 repeatedly receive a physical downlink shared channel (PDSCH) carrying the downlink data multiple times, across D consecutive subframes starting from a subframe n+k after a subframe n, based on the downlink control information, 
 wherein the subframe n is within the N consecutive subframes, and the subframe n is a subframe where the PDCCH is received last, 
 wherein the downlink control information includes repetition number information for the PDSCH, and D is an integer determined based on the repetition number information, and 
 wherein k is an integer greater than 0. 
 
     
     
       10. The user equipment according to  claim 9 ,
 wherein the processor is configured to control the transceiver to receive a higher layer signal including information on a maximum number of repetitions for the PDCCH, 
 wherein N is less than or equal to the maximum number of repetitions for the PDCCH. 
 
     
     
       11. The user equipment according to  claim 9 ,
 wherein the processor is configured to control the transceiver to receive information on a start of the N consecutive subframes. 
 
     
     
       12. The user equipment according to  claim 9 ,
 wherein the repeatedly received PDCCH is received using a same control channel element (CCE) resource within the N consecutive subframes. 
 
     
     
       13. A base station for transmitting downlink data, the base station comprising:
 a transceiver unit, and 
 a processor configured to control the transceiver to: 
 repeatedly transmit a physical downlink control channel (PDCCH) carrying downlink control information multiple times across N consecutive subframes, where N is an integer greater than 1; and 
 repeatedly transmit a physical downlink shared channel (PDSCH) carrying the downlink data multiple times, across D consecutive subframes starting from a subframe n+k after a subframe n, based on the downlink control information, 
 wherein the subframe n is within the N consecutive subframes, and the subframe n is a subframe where the PDCCH is transmitted last, 
 wherein the downlink control information includes repetition number information for the PDSCH, and D is an integer determined based on the repetition number information, and 
 wherein k is an integer greater than 0. 
 
     
     
       14. The base station according to  claim 13 ,
 wherein the processor is configured to control the transceiver to transmit a higher layer signal including information on a maximum number of repetitions for the PDCCH, 
 wherein N is less than or equal to the maximum number of repetitions for the PDCCH. 
 
     
     
       15. The base station according to  claim 13 , further comprising:
 wherein the processor is configured to control the transceiver to transmit information on a start of the N consecutive subframes. 
 
     
     
       16. The base station according to  claim 13 , wherein the repeatedly transmitted PDCCH is transmitted using a same control channel element (CCE) resource within the N consecutive subframes.